# include <bits/stdc++.h>
using namespace std;
int k;
double a, b, c, d, x;
int main() {
	cin >> a >> b >> c >> d;
	for(k = -10000; k <= 10000; k++) {
		x = (double) k / 100;
		if(a * x * x * x + b * x * x  + c * x + d == 0) printf("%.2lf ", x);
	}
}
